CCC INFORMATION SERVICES GROUP INC. ANNOUNCES
                    PRELIMINARY RESULTS OF SELF-TENDER OFFER

CHICAGO,  August  31,  2004 - CCC INFORMATION SERVICES GROUP INC. (NASDAQ: CCCG)
announced  today the preliminary results of its self-tender offer to purchase up
to  11,200,000  shares  of its common stock at a price of $18.75 per share.  The
self-tender  offer expired at 5:00 p.m., New York City time, on August 30, 2004.
Approximately  25,352,749  shares of common stock were properly tendered and not
withdrawn,  of  which  approximately  1,790,433 shares were tendered pursuant to
notices  of  guaranteed  delivery.

Based  on preliminary results which indicate that the offer is oversubscribed, a
proration  factor  of  approximately 44.4183 percent for shares tendered will be
applied;  i.e.,  44.4183  percent  of each stockholder's tendered shares will be
repurchased,  except  that  all  shares  tendered  from holders of less than 100
shares  will  be  purchased  by  the company.  The estimated proration factor is
subject  to  change.  The  final  proration  factor  is expected to be announced
approximately  seven  business  days  following  the  expiration  of  the offer.
As  of  August  30, 2004, the company had approximately 26,768,285 shares of its
common  stock  outstanding  and  4,422,970  shares  reserved  for  issuance upon
exercise  of outstanding options and warrants.  As a result of the completion of
the  offer,  the  company expects to have approximately 15,798,650 shares of its
common stock issued and outstanding as of the time immediately following payment
for  the  tendered  shares.

The  offer to purchase and related documents have been mailed to stockholders of
record  and are available for distribution to beneficial owners of CCC's shares.
For  questions or information, please call Georgeson Shareholder Communications,
Inc.,  the  information  agent  for  the  self-tender  offer, toll free at (800)
255-4719.

This press release is intended for information purposes only and is not an offer
to  buy or the solicitation of an offer to sell any shares of any class of CCC's
common  stock.  The  solicitation of offers to buy shares of CCC common stock is
only  made  pursuant to the offer to purchase and related materials that CCC has
sent  to  its  stockholders.  Stockholders should read those materials carefully
because  they contain important information, including the various terms of, and
conditions  to, the tender offer.  Stockholders can obtain the offer to purchase
and  related  materials for free at the SEC's website at WWW.SEC.GOV or from our
information  agent, Georgeson Shareholder Communications, Inc., by calling (800)
255-4719.

ONCE  THE  TENDER  OFFER  IS  COMPLETE,  THE  COMPANY  WILL UPDATE ITS FINANCIAL
GUIDANCE  TO  REFLECT  THE  EFFECTS  OF  THE  TRANSACTION.

ABOUT  CCC

CCC Information Services Group Inc. (NASDAQ: CCCG), headquartered in Chicago, is
a  leading  supplier  of advanced software, communications systems, Internet and
wireless-enabled  technology  solutions  to  the automotive claims and collision
repair  industries.  Its  technology-based  products  and  services  optimize
efficiency  throughout  the entire claims management supply chain and facilitate
communication  among  approximately  21,000  collision  repair  facilities,  350
insurance companies, and a range of industry participants.  For more information
about  CCC  Information  Services,  visit  CCC's  Web  site  at  www.cccis.com.